1202 



CRUSTACEA. 



The peculiar spectacle-eyes of this family were overlooked in the 

 original examination of the genus Sapphirina by Thompson, and also 

 in the descriptions of other species. The existence of lenticular 

 corneae is not peculiar to these species among Crustacea; but they 

 have been observed only in compound eyes, in which case the lens 

 and cornea are minute and not far distant. In the Corycaeidae they 

 are often very remote, and of great size. 



This family comprises two subfamilies ; one of which, the Mira- 

 Cinje, is related to the Harpacticinse, — the structure of the body, 

 frontal appendages, antennae, single external ovarian sac, and other 

 parts, being nearly as in Setella; the other, the Coryeaeinae, having 

 two bags of eggs, as in Cyclops, but diverging widely from that group, 

 in the monodactyle posterior antennae, the absence of mandibular and 

 maxillary palpi, and approaching Harpacticus somewhat in the mono- 

 dactyle anterior legs, and the simple superior antennae. The follow- 

 ing are the genera of these subfamilies and their characteristics •* 



Subfam. 1. CORYCiEINiE. — Antennae anticae non appendiculatas. 

 Antennae posticae plus minusve monodactylae. Sacculi ovigeri duo. 



Gr. 1. Coryc^us, Dana.-f — Cephalothorax crassus, non depressus, antice rotundatus 

 et conspicilla gerens, postice saepius acutus. Abdomen multo angustius, pauci- 

 articulatum, appendicibus basalibus earens. Antennae posticae monodactylae 

 pedibusque anticis majores. Pedes antici quoad sexus vix dissimiles, digito 

 tenui confecti. Styli caudales styliformes. 



€r. 2. Antaria, Dana.\ — Cephalothorax fere ac in Coryc&o, postice rotundatus. 

 Abdomen ac in Corycseo. Antennae posticae parvae, pedibus anticis non majores, 

 digito apice breviter setigero, carpo postice angulato. Pedes antici quoad sexus 

 vix dissimiles, monodactyli, digito tenui subuncinato. 



G. 3. Copilia, Dana.%— Cephalothorax depressus, fronte late quadrato et conspi- 

 cilla ac angulos anticos gerente. Antennae posticae monodactylae, digito elongato, 

 subulato. Abdomen pauci-articulatum, appendicibus basalibus earens. 



* The new species of Corycseidge beyond are briefly described in the Proceedings of 

 the Amer. Acad. Sei. Boston, ii. 1849. 



f Proc. Acad. Nat. Sci. Philad., ii. 285, 1845; Amer. J. Sci. [2], i. 228, viii. 280, 

 ix. 133; Proc. Amer. Acad. Sci., ii. 35, 1849. 



% Amer. J. Sci. [2], i. 229 ; Proc. Amer. Acad. Sci. ii. 39. A species of this genus 

 or of a Corycaeus, is rudely figured by Dr. W. Baird, without a name, excepting a refe- 

 rence to the genus Cyclops, in Loudon's Magazine, iv. 501, 1831. 



§ Proc. Amer. Acad. Sci., ii. 40. 



