MARINE I'AUNA AXD FLORA OF SOUTH DEVON AND CORNWALL. 89 



nearer to Squilleyichthys than is Squill erichthys to Sqidlla. This separation 

 appears to receive a wider demarcation from the circumstance that Mrs. 

 Collings took attached to her specimen several small ova ; two of these, Avith 

 the specimen, she kindly forwarded to me for inspection. These, however, 

 after due consideration, I came to the conclusion were only accidentally 

 entangled, or else deposited by some parasitic animal, since they were at- 

 tached to a large flexile membrane diftering essentially from those that cover 

 the ova of Crustacea generally. 



Fortunately, however. Dr. Power, while staying in the Mauritius, hatched 

 and forwarded to me a considerable number of the young of different Crus- 

 tacea; among these were those of a Squilla. This, although the young of 

 an exotic species, bears so close a relation to the genus Alima of Milne- 

 Edwards, that we can have no hesitation in accepting them as different stages 

 in the growth of animals of the same genus. 



So with Squillerichth)/s, the features that distinguish it from Squilla being 

 clearly expressed in the larva of Squilla, and repeated in the form of Alima 

 in a condition that is a modification between it and Squillerichthys, conduces 

 to the conviction that, like Alima, Squillerichthys is but a stage in the de- 

 velopment oi Squilla, a circumstance that enables us with much confidence to 

 unite the three supposed genera as different stages in the progressive de- 

 velopment of one and the same genus. 



In the entrance to the channel, during the present spring, largo quantities 

 of the Crustacea named by Prof. Bell, in his ' Histoiy of the British Crus- 

 tacea,' Thysanopoda Couchii, were taken in the stomachs of fish; of these a 

 considerable number were sent to me by Mr. Loughrin, but they were not in a 

 condition favourable for examination. The pendulous ovipouch, that affords 

 such a peculiar feature to the animal, was generally of a bright orange-colour ; 

 but, generally speaking, the contents had been so acted upon by tho digestive 

 juices that little was determinable from them. This I think we may speak 

 with certainty, that they are not of the genus Thysanopoda. 



OSTRACODA. 



The following Ostracoda, which have been examined for us by G. S. 

 Brady, F.L.S., were dredged off the Eddystone in 40 fathoms of water : — 



Pontocypris mytiloides, Norman. Loxoconcha guttata, Norman. 



trigonella, G. 0. Sars. tamarindus, Jo?ies. 



angusta, Brady. Xestoleberis aurautia, Baird. 



Bairdia inflata, Norman. Cytherura angulata, Brady. 



■ acanthigera, Brady. cuneata, Brady. 



Cythere pellucida, Baird. striata, Sars. 



tenera, Brady. similis, Sars. 



badia, Brady. acuticostata, Sars. 



convesa, Baird. Cytheropteron punctatum, Brady. 



finmarchica, Sars. nodosum, Brady. 



■ villosa, Sars. miiltiforum, Norman. 



emaoiata, Brady. subcircinatum, Sars. 



semipunctata, Brady. Bathocythere constricta, Sars. 



• cuneiformia, Brady. turgida, Sars. 



antiquata, Baird. Pseudocythere caudata, Sars. 



Jonesii, Baird. Scleroohilus contortus, Norman. 



acerosa, Brady. Paradoxostoma ensiforme, Brady. 



Eucythere parva, Brady. abbreviatum, Sars. 



Loxoconcha impressa, Baird. Polycope compressa, Brady. 



Annelids. 

 Dr. M'Tntosh, F.K.S.E., F.L.S., says a considerable collection of Annelids 



