716 RECORD OF CURRENT RESEARCHES RELATING TO 



apparently due to the fact that it sujiplies the sixth and seventh 

 segments and the rudimentary abdomen. The eyes, which are without 

 stalks, lie at the sides of the head and have a few pear-shaped 

 crystalline cones imbedded in a brownish-red pigment ; the tactile 

 organs are represented by setae, which are especially well-developed 

 on tlie flagellum of the superior pair of antennae ; as in most 

 Ampliipoda there is no distinct auditory organ ; on the same flagella 

 are found delicate white bodies, which are evidently olfactory in 

 function. The frontal organs, which seem to be found in all other 

 AmpMi>oda, are here also found ; j^aii-ed and lying just behind the 

 root of the superior antemife, they are goblet-shaped in form, but 

 their function remains unknown. 



The oesophagus is simple in structure, and the gastric skeleton, 

 though very similar to that of Garnmarus, is more simple ; an inferior 

 prolongation, ajiparently homologous with the appendix campaniformis 

 described by Sars in Garnmarus and 2Iy$is, is present ; the structures 

 taken by Goodsir, on account of their long cylindrical form, to be ovaries, 

 arc shown to be hepatic tubes ; they contain a yellowish -brown oily 

 fluid. The elongated tubular heart, which lies above the intestine, is 

 connected with the integximent by bands of connective tissue ; it opens 

 to the vascular system by five clefts ; a large part of the vascular 

 system is lacunar, and the yellowish blood-corpuscles are, though not 

 strikingly, spindle-shaped. So far as the author has been able to 

 make them out there is but one, and not as in the allied forms 

 described by Dohi-n, two pairs of testes ; in Caprella cequilihra each 

 consists of a tube, which commences in a rounded process at the 

 binder end of the fifth segment, and rapidly becomes excessively 

 narrow ; the external appendages of the male consist of two small 

 curved structm-es, which are placed on the ventral sui-face of the 

 abdomen. The ovaries are likewise tubular, and are elongated 

 structures, which extend as fai- forward as the second, and open in the 

 fifth segment. The ovum, as found in the brood-pouch, is ellipse- 

 shaped, and is completely filled with dark granules and fat-drops ; 

 cleavage seems to be complete ; the larger rounded colls of the yolk 

 appear to form the head and its appendages, with the anterior thoracic 

 segments, while the smaller elongated jmrts form the hinder segments 

 and the abdomen. The young form is exactly similar to the adult, 

 but as a rule it remains in the pouch until its muscles are well 

 developed, although it is quite capable, if compelled, of taking to the 

 water. 



CaprellidEe of the Mediterranean.* — Dr. Haller describes sixteen 

 species, belonging to the genera Eota, Protella, Caprella, and Podalirius; 

 of these, eight appear to be new. He observes that the species of the 

 genus Caprella may be divided into two groups, in one of which the 

 inferior pair of antennae are provided with simple sensory hairs, 

 while in the other the same structures are closely beset with more 

 complicated setae. In C antennata, n. sp., of which only a female 

 was found, the anterior pair of antennae are nearly as long as the 

 body. 



* ' Zool. Anzeigcr,' ii. (1S79) p. 230. 



