INVERTEBEATA, CRYPTOGAMIA, MICROSCOPY, ETC. 253 



The families are defined, and the genera and species described 

 in order ; of forms new to science arc Eatypliis armatus (very common 

 in the Atlantic and Indian oceans) ; JE. serratus (Zanzibar and Mes- 

 sina) ; E. globosus (Messina) ; Hemitijphis terminanus (Atlantic Ocean, 

 Cape of Good Hope); H. crustulum (Zanzibar); ParatypMs macu- 

 latus (Atlantic) ; Tetrathyrus forcipatus (do.) ; Ampliithyrus hispinosKS 

 (Atlantic) ; A. sculpturatus (do.) ; A. similis (Messina) ; Tanyscelus 

 spheroma (Zanzibar) ; Parascelus Edwardsi (Atlantic) ; P. typlwides 

 (Messina and Naples) ; P. parvus (Atlantic) ; Schizoscelus ornntus 

 (Atlantic) ; Eusceliis rohustiis (Zanzibar) ; Eupronoii maculata (Zan- 

 zibar) ; E. armaia (Atlantic, Zanzibar) ; E. minuta (Southern Seas) ; 

 Parapronoe constidum (Atlantic, Zanzibar) ; P. parva (Zanzibar) ; 

 Thaviyris glohiceps (Zanzibar) ; Lyc(ea nasuta (do.) ; L. similis (Lagos) ; 

 L. serrata (Bengal) ; L. robusta (Mediterranean) ; Paralyccea gracilis 

 (Hab. V) ; Pseudolyccea pachypoda (Messina, Zanzibar) ; Lycceopsis 

 themistoides (Mediterranean) ; Oxyceplialus similis (Messina) ; 0. laii- 

 rostris (Lagos) ; 0. longiceps (Zanzibar) ; 0. typhoides (Zanzibar, Mes- 

 sina). As will be observed, many of the later genera are also new. 



The forms contained in this group ajjpear to exhibit a very con- 

 siderable degree of variation in the characters of many of their organs, 

 and in their external forms there are all stages between the broad and 

 rounded Typhidfe, and the elongated, rod-shaped Oxycephalidge (e. g. 

 Rhabdosoma — a name well suited to describe the creatui-e's form). 



Anatomy of Caprellidae.* — Dr. Hoek, in an article on the anatomy 

 and classification of the Caprellidfe (a subject to which Gamrothf 

 has been lately directing his attention), points out what no previous 

 observer seems to have noted — the presence of concentrically striated 

 plates of small size, which are to be found in Caprella linearis, between 

 the chitinogenous tissue and the chitinous investment ; varying in 

 form and size, they are best seen in adult specimens. Nor does any 

 mention seem yet to have been made of the caualiculi which are to be 

 found at the ends of the second pair of thoracic appendages. With 

 regard to these, the author is of opinion that tlicy are the canals of 

 integumentary glands ; but the glands themselves lie was never able 

 to find in C. linearis. 



Dr. Hoek then deals with various points on which more or less 

 difl'erent repoi ts have been made ; among these, perhaps the most 

 interesting is the relations of the generative orifice. Berzelius, Sars, 

 and Huxley state that it is found on the ventral surface of the last 

 ring of the thorax ; and the latter has directed attention to the fact 

 tliat in the Decapoda (h)bsters, crabs, &c.) the orifice is to be found 

 on the first (or basal) joint of the appendage. Now, in C. linearis 

 Hoek finds lateral processes on these basal joints, which meet in 

 the middle line of the body. lie is not absolutely certain that 

 these processes belong to these joints (-'coxro "), and ho comes to the 

 conclusion, further, tliat tho copulatory pouches of the female are 

 appcn<lcd to the ventral surface. 



Into tho systematic points with which the author carefully deals 



• ' Tijdsclir. Nedorlaiid. Diork. Verccu,' iv. (IST'J) \>. Ul. 

 t Sec this Juuruiil, ii. (I87'J) p. 715. 



